GB1315752A - Brushless dc motors and commutating circuits therefor - Google Patents

Brushless dc motors and commutating circuits therefor

Info

Publication number
GB1315752A
GB1315752A GB2535271*A GB2535271A GB1315752A GB 1315752 A GB1315752 A GB 1315752A GB 2535271 A GB2535271 A GB 2535271A GB 1315752 A GB1315752 A GB 1315752A
Authority
GB
United Kingdom
Prior art keywords
pulse
counter
pulses
gate
stator windings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2535271*A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sperry Corp
Original Assignee
Sperry Rand Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sperry Rand Corp filed Critical Sperry Rand Corp
Publication of GB1315752A publication Critical patent/GB1315752A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/14—Electronic commutators
    • H02P6/16—Circuit arrangements for detecting position
    • H02P6/18—Circuit arrangements for detecting position without separate position detecting elements
    • H02P6/182—Circuit arrangements for detecting position without separate position detecting elements using back-emf in windings

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

1315752 Brushless DC motors SPERRY RAND CORP 19 April 1971 [6 April 1970] 25352/71 Heading H2A [Also in Division H3] A commutating circuit for a brushless D.C. motor comprises a pulse source 11 for producing pulses at a given repetition rate, a switching arrangement 9 responsive to the pulses for sequentially energizing the motor stator windings, a gate 15 responsive to the counter e.m.f.'s in the stator windings for producing an output when the counter e.m.f. of a winding exceeds a predetermined value, and a synchronizing unit 17 responsive to the gate output for accelerating the pulse repetition rate of the pulse source 11. In the permanent magnet rotor motor shown, the three stator windings are commutated by thyristors 19, 21 and 23 which are triggered through diodes 45, 35 and 41 by pulses from the pulse source. The source includes a capacitor 61 normally charged through resistors 63 and 65 and discharged through a programmable unijunction transistor 53. When the winding counter e.m.f.'s exceed the supply voltage the diodes 73, 75 and 77 of OR gate 15 are individually forward biased to render conductive a transistor 67 which by-passes high value resistance 65 and so reduces the charging time of the capacitor 61. Under normal running conditions transistor 67 is periodically turned on by the counter e.m.f.'s and pulse source 11 feeds pulses to the thyristors 19, 21 and 23 so that the latter are sequentially fired in accordance with rotor position. At start up, diodes 81, 83 and 85 of AND gate 13 are reverse biased by the voltages on the stator windings and normally forward biased diode 87 is reverse biased by a pulse from source 11 so that a pulse is produced on tine 97 to trigger thyristor 19.
GB2535271*A 1970-04-06 1971-04-19 Brushless dc motors and commutating circuits therefor Expired GB1315752A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US2581270A 1970-04-06 1970-04-06

Publications (1)

Publication Number Publication Date
GB1315752A true GB1315752A (en) 1973-05-02

Family

ID=21828187

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2535271*A Expired GB1315752A (en) 1970-04-06 1971-04-19 Brushless dc motors and commutating circuits therefor

Country Status (3)

Country Link
US (1) US3611081A (en)
JP (1) JPS5040845B1 (en)
GB (1) GB1315752A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2604638A1 (en) * 1976-02-06 1977-08-11 Teldix Gmbh DRIVE CIRCUIT FOR A COLLECTORLESS DC MOTOR
GB2119589A (en) * 1982-04-02 1983-11-16 Sony Corp Driving circuit for brushless d c motor

Families Citing this family (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3806785A (en) * 1969-06-10 1974-04-23 Anvar Brushless d. c. electric machine
DE2115777B2 (en) * 1971-04-01 1973-04-12 Gebr. Bühler Nachfolger GmbH, 8500 Nürnberg COLLECTORLESS DC MOTOR
US3746941A (en) * 1971-10-07 1973-07-17 V Ageev Device for controlling the speed of a d. c. motor with a noncontact switch
US3780362A (en) * 1972-02-15 1973-12-18 B Stromin Method for control of a brushless motor
US3986086A (en) * 1972-05-25 1976-10-12 Papst-Motoren Kg Control circuit for brushless D-C motor
JPS565115B2 (en) * 1972-10-16 1981-02-03
DE2251292C3 (en) * 1972-10-19 1984-03-29 Papst-Motoren GmbH & Co KG, 7742 St Georgen Arrangement for speed control of a brushless DC motor
JPS5633953B2 (en) * 1973-10-30 1981-08-06
US5023527A (en) * 1974-06-24 1991-06-11 General Electric Company Control circuits, electronically commutated motor systems and methods
US4459519A (en) * 1974-06-24 1984-07-10 General Electric Company Electronically commutated motor systems and control therefor
US4169990A (en) * 1974-06-24 1979-10-02 General Electric Company Electronically commutated motor
US4027215A (en) * 1974-07-01 1977-05-31 Xerox Corporation Rotary machine
US3980933A (en) * 1974-12-19 1976-09-14 Ford Motor Company Control circuit for variable reluctance motor
US4074179A (en) * 1975-06-16 1978-02-14 Warner Electric Brake & Clutch Company Position detection methods and apparatus for stepping motors
US4162435A (en) * 1976-10-05 1979-07-24 General Electric Company Method and apparatus for electronically commutating a direct current motor without position sensors
US4492903A (en) * 1977-05-23 1985-01-08 Nu-Tech Industries, Inc. Optimum efficiency brushless DC motor
US4262236A (en) * 1979-04-11 1981-04-14 General Motors Corporation Commutatorless direct current motor drive system
US4262237A (en) * 1979-06-08 1981-04-14 General Motors Corporation Commutatorless direct current motor drive system
DE2949947C2 (en) * 1979-12-12 1982-06-24 Braun Ag, 6000 Frankfurt Circuit arrangement for controlling and regulating a brushless electric motor with a permanent magnet rotor
US4513230A (en) * 1980-04-17 1985-04-23 General Electric Company Laundering apparatus, method of operating a laundry machine, control system for an electronically commutated motor, and method of operating an electronically commutated motor
US4556827A (en) * 1980-04-17 1985-12-03 General Electric Company Laundering apparatus, method of operating a laundry machine, control system for an electronically commutated motor, method of operating an electronically commutated motor, and circuit
US4532459A (en) * 1980-04-17 1985-07-30 General Electric Company Laundering apparatus, method of operating a laundry machine, control system for an electronically commutated motor and method of operating an electronically commutated motor
US4484114A (en) * 1982-03-04 1984-11-20 Rotron, Incorporated Self-starting brushless DC motor
US4528485A (en) * 1982-04-13 1985-07-09 General Electric Company Electronically commutated motor, method of operating such, control circuit, laundry machine and drive therefor
FR2542872B1 (en) * 1983-03-18 1985-07-05 Etri Sa
US4492902A (en) * 1983-06-03 1985-01-08 Allied Corporation Permanent magnetic motor common leg impedance compensation means
US4491772A (en) * 1983-06-09 1985-01-01 General Electric Company Control circuit for an electronically commutated motor (ECM), method of timing the electronic commutation of an ECM, and method of operating an ECM
US4499408A (en) * 1983-06-09 1985-02-12 General Electric Company Control circuit for an electronically commutated motor, an integrated circuit for an ECM, and a method of operating an ECM
US4494055A (en) * 1983-06-09 1985-01-15 General Electric Company Control circuit for an electronically commutated motor including reversing; method of operating an ECM including reversing
US4500821A (en) * 1983-06-09 1985-02-19 General Electric Company Speed or torque control circuit for an electronically commutated motor (ECM) and method of controlling the torque or speed of an ECM
JPH082192B2 (en) * 1984-02-29 1996-01-10 ティアツク株式会社 Brushless DC motor
US4584506A (en) * 1984-11-23 1986-04-22 Polestar Magnetronics Inc. Reluctance motor with electronically controlled stator windings
DE3602227A1 (en) * 1986-01-25 1987-07-30 Philips Patentverwaltung COMMUTATION CIRCUIT FOR A COLLECTORLESS DC MOTOR
US5123079A (en) * 1986-03-10 1992-06-16 Minolta Camera Kabushiki Kaisha DC motor and controlling system therefor
JPH07118944B2 (en) * 1986-03-17 1995-12-18 株式会社日立製作所 Brushless DC motor
DE3715939A1 (en) * 1986-05-14 1987-11-19 Matsushita Electric Ind Co Ltd CIRCUIT ARRANGEMENT FOR CONTROLLING THE SPEED OF A MOTOR
SE8802394D0 (en) * 1988-06-27 1988-06-27 Electrolux Mecatronik Ab RELUCTANCE
IT1249839B (en) * 1991-10-15 1995-03-28 Magneti Marelli Spa LINEAR CONTROL CIRCUIT IN FEEDBACK FOR A BRUSHLESS MOTOR WITH A HALF-WAVE POLYPHASE.
JPH05122978A (en) * 1991-10-31 1993-05-18 Toshiba Corp Driving circuit for brushless motor
US5821660A (en) * 1997-03-05 1998-10-13 Mts Systems Corporation Brushless direct current motor having adjustable motor characteristics
EP1443635B1 (en) * 2003-01-21 2009-10-07 Grundfos A/S Method for controlling a firing angle and single phase AC fed electric motor
DE102007040725A1 (en) * 2007-08-29 2009-03-05 Robert Bosch Gmbh Electric machine
US8183810B2 (en) 2009-09-08 2012-05-22 Hoffman Enclosures, Inc. Method of operating a motor
US8297369B2 (en) 2009-09-08 2012-10-30 Sta-Rite Industries, Llc Fire-extinguishing system with servo motor-driven foam pump
US8164293B2 (en) 2009-09-08 2012-04-24 Hoffman Enclosures, Inc. Method of controlling a motor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1239390B (en) * 1963-07-05 1967-04-27 Licentia Gmbh Control circuit to keep a given speed constant for a direct current motor with permanent magnetic field
DE1224824B (en) * 1963-08-02 1966-09-15 Siemens Ag Circuit arrangement for brushless direct current miniature motors
US3488566A (en) * 1967-08-08 1970-01-06 Akai Electric Brushless d.c. motor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2604638A1 (en) * 1976-02-06 1977-08-11 Teldix Gmbh DRIVE CIRCUIT FOR A COLLECTORLESS DC MOTOR
GB2119589A (en) * 1982-04-02 1983-11-16 Sony Corp Driving circuit for brushless d c motor
US4446406A (en) * 1982-04-02 1984-05-01 Sony Corporation Brushless DC motor driving circuit

Also Published As

Publication number Publication date
JPS5040845B1 (en) 1975-12-27
US3611081A (en) 1971-10-05

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees